{
  "id": "1010.1074",
  "version": "v2",
  "published": "2010-10-06T07:00:00.000Z",
  "updated": "2011-11-20T12:56:00.000Z",
  "title": "Cosmological Constraints on the Sign-Changeable Interactions",
  "authors": [
    "Hao Wei"
  ],
  "comment": "15 pages, 1 table, 8 figures, revtex4; v2: published version",
  "journal": "Commun.Theor.Phys.56:972-980,2011",
  "doi": "10.1088/0253-6102/56/5/29",
  "categories": [
    "gr-qc",
    "astro-ph.CO",
    "hep-th"
  ],
  "abstract": "Recently, Cai and Su [Phys. Rev. D {\\bf 81}, 103514 (2010)] found that the sign of interaction $Q$ in the dark sector changed in the approximate redshift range of $0.45\\,\\lsim\\, z\\,\\lsim\\, 0.9$, by using a model-independent method to deal with the observational data. In fact, this result raises a remarkable problem, since most of the familiar interactions cannot change their signs in the whole cosmic history. Motivated by the work of Cai and Su, we have proposed a new type of interaction in a previous work [H. Wei, Nucl. Phys. B {\\bf 845}, 381 (2011)]. The key ingredient is the deceleration parameter $q$ in the interaction $Q$, and hence the interaction $Q$ can change its sign when our universe changes from deceleration ($q>0$) to acceleration ($q<0$). In the present work, we consider the cosmological constraints on this new type of sign-changeable interactions, by using the latest observational data. We find that the cosmological constraints on the model parameters are fairly tight. In particular, the key parameter $\\beta$ can be constrained to a narrow range.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2011-11-20T12:56:00.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "95.36.+x",
      "98.80.Es",
      "98.80.-k"
    ],
    "keywords": [
      "cosmological constraints",
      "sign-changeable interactions",
      "approximate redshift range",
      "latest observational data",
      "universe changes"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Communications in Theoretical Physics",
      "year": 2011,
      "month": "Nov",
      "volume": 56,
      "number": 5,
      "pages": 972
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 871886,
      "adsabs": "2011CoTPh..56..972W"
    }
  }
}